"Four Phases of Morals: Socrates, Aristotle, Christianity, Utilitarianism" by John Stuart Blackie Morality has always been a hot topic of debate and philosophy. In this book, Blackie looks at how the subject has simultaneously changed and, at times, remained the same throughout time. Starting with the ancient Greeks, he moves through history and how changes in civilization and society's culture shaped the way people thought about morals.